Calculator



FIG. 1 is a front perspective view from above of a calculator embodying my new and ornamental design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof; and,

FIG. 7 is a rear perspective view thereof from above. 

The ornamental design for a calculator, as shown. 